63398557 has 4 divisors (see below), whose sum is σ = 66155040. Its totient is φ = 60642076.

The previous prime is 63398551. The next prime is 63398563. The reversal of 63398557 is 75589336.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (63398551) and next prime (63398563).

It is not a de Polignac number, because 63398557 - 2¹⁹ = 62874269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63398551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1378207 + ... + 1378252.

It is an arithmetic number, because the mean of its divisors is an integer number (16538760).

Almost surely, 2^63398557 is an apocalyptic number.

It is an amenable number.

63398557 is a deficient number, since it is larger than the sum of its proper divisors (2756483).

63398557 is a wasteful number, since it uses less digits than its factorization.

63398557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756482.

The product of its digits is 680400, while the sum is 46.

The square root of 63398557 is about 7962.3210811923. The cubic root of 63398557 is about 398.7430480669.

The spelling of 63398557 in words is "sixty-three million, three hundred ninety-eight thousand, five hundred fifty-seven".